Localizing obscure upper gastrointestinal bleeding by the fluorescein string test.
D000368:Aged; D002986:Clinical Trials as Topic; D005452:Fluoresceins / Q000008:administration & dosage*; D006471:Gastrointestinal Hemorrhage / Q000175:diagnosis*; D006801:Humans; D008875:Middle Aged
D005452:Fluoresceins